EHD66764 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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EHD66764

176-channel Common Driver for Color Displays

Hitachi -> Renesas Electronics 

HD66764

Pin Functions

Table 1 Pin Functions

Signal Name

Vcc

GND

VLCD

VEE

VciOUT

Vci1

Vci2

VCH

VSH

VM

VCL

VLOUT1

VLOUT2

C11+, C11- to

C23+, C23-

CE+, CE-

Quantity

1

1

1

1

1

1

1

4

1

1

10

2

Input/

Output

-

-

-

-

-

-

-

-

-

-

-

-

Connected to

Power supply

Power supply

Power supply

or VLOUT2

Power supply

or VCL

Vci1 and

capacitor for

stabilization or

open

VciOUT or

power supply

VLOUT1 or

power supply

Capacitor for

stabilization

and VSH of

HD66763 or

external power

supply

Step-up

capacitance/

Vci2 pin

Step-up

capacitance/

VLCD pin

Step-up

capacitance or

open

Step-up

capacitance or

open

Function

VCC-GND: Logic-circuit power supply. Supply

the same voltage as for the HD66763.

LCD-drive-circuit power supply, positive side.

LCD-drive-circuit power supply, negative side.

Outputs a regulated voltage derived from Vcc.

Connect a capacitor for stabilization. When this

pin is not used, leave it open.

Voltage-input pin for step-up circuit 1. When the

Vci adjuster is used, input the power supply from

VciOUT. When not used, input the external

power supply.

Voltage-input pin in step-up circuit 2. When the

internal step-up circuit is not used, leave this pin

open.

When the internal power supply circuit is used, the

LCD-drive-level power supply is output here.

VCH, VM, and VCL are used for the common

driver, and VSH for the segment driver. Connect

a capacitor for stabilization of the display quality.

When the internal power-supply circuit is not

used, connect the output of the external power-

supply circuit. However, VSH need not be

supplied.

A voltage that doubles or triples the voltage

between Vci1 and GND is output here. The

step-up factor can be set in an internal register.

A voltage that is boosted from the voltage

between Vci1/Vci2 and GND is output here. The

step-up factor can be set in an internal register.

Connect a step-up capacitor according to the

step-up factor. When the internal step-up circuit

is not used, leave this pin open.

Connect a step-up capacitor for generating the

VCL level from the VCH and VM levels. When

the internal step-up circuit is not used, leave this

pin open.

6

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